Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos motores b5204 t3?
 ###Tabelas: CREATE TABLE exit_polling (exit_polling_id AUTO_INCREMENT PRIMARY KEY, Classification VARCHAR, % of all VARCHAR, John Kerry VARCHAR, John Edwards VARCHAR, Dennis Kucinich VARCHAR) CREATE TABLE models_and_engines (models_and_engines_id AUTO_INCREMENT PRIMARY KEY, model VARCHAR, max. motive power VARCHAR, max. torque at rpm VARCHAR, engine displacement VARCHAR, engine type VARCHAR, engine configuration & notes 0-100km/h VARCHAR) CREATE TABLE goals_for_senior_national_team (goals_for_senior_national_team_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Score VARCHAR, Result VARCHAR, Competition VARCHAR) CREATE TABLE list_of_special_representatives (list_of_special_representatives_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Born-Died VARCHAR, Took Office VARCHAR, Left Office VARCHAR, Country VARCHAR) CREATE TABLE bi-_tl-_and_hg-based_high-__c__superconductors (bi-_tl-_and_hg-based_high-__c__superconductors_id AUTO_INCREMENT PRIMARY KEY, Formula VARCHAR, Notation VARCHAR, T c (K) INT, No. of Cu-O planes in unit cell INT, Crystal structure VARCHAR)  
SELECT COUNT engine displacement FROM models_and_engines WHERE engine type = B5204 T3